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參數(shù)資料
| 型號： | MAX1823BEUB |
| 廠商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分類： | 電源管理 |
| 英文描述： | Replaced by TMS320BC52 : |
| 中文描述： | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO10 |
| 封裝： | MICRO, SOP-10 |
| 文件頁數(shù)： | 10/13頁 |
| 文件大?。?/td> | 302K |
| 代理商： | MAX1823BEUB |
M
Dual USB Switch with Fault
Blanking and Autoreset
10
______________________________________________________________________________________
After the fault condition is removed, the
FAULT_
output
deasserts after a 20ms delay. Ensure that the MAX1823
has adequate input bypass capacitance to prevent
glitches from triggering
FAULT_
outputs. Input glitches
greater than 0.2V/μs may cause erroneous
FAULT_
indications.
Behavior During Current Limit
and Fault Blanking
The MAX1823 limits switch current in three ways. When
ON_ is deasserted (high for MAX1823/MAX1823A, low
for MAX1823B/MAX1823H), the switch is off and leak-
age dominates the residual output current. When ON_
is asserted (low for MAX1823/MAX1823A, high for
MAX1823B/MAX1823H), the switch supplies a continu-
ous output current of at least 720mA. When the output
current exceeds the 0.9A threshold, the MAX1823 lim-
its the current depending on the output voltage. For
V
OUT_
greater than 1V (current-limit mode), the
MAX1823 regulates the output current to 0.9A. For
V
OUT_
less than 1V (short-circuit mode), the MAX1823
pulses the switch, decreasing the current to 0.35A
RMS
(Table 1). Note that a thermal overload may result from
either of these high-current conditions.
The MAX1823 switches may enter current limit in nor-
mal operation when powering up or driving heavy
capacitive loads. To differentiate these conditions from
short circuits or sustained overloads that may damage
the device, the MAX1823 has an independent fault-
blanking circuit in each switch. When a load transient
causes the device to enter current limit, an internal
counter starts to monitor the duration of the fault. For
load faults exceeding 20ms fault-blanking time, the
switch turns off, the
FAULT_
signal asserts low, and the
device enters autoreset mode (see the
Autoreset Mode
section). Only current-limit and short-circuit faults are
blanked. Thermal-overload faults and input voltage
drops below the UVLO threshold immediately cause
the switch to turn off and
FAULT_
to assert low.
ONA
MAX1823/MAX1823A
MAX1823B/MAX1823H
CHARGE
PUMP
ONB
CHARGE
PUMP
*(ONA)
*(ONB)
*( ) ARE FOR THE MAX1823B/MAX1823H.
OSC
25kHz
BIAS
UVLO
REF
GND
0.1
μ
F
4V TO 5.5V
IN_
TIMER
20ms
THERMAL
SHUTDOWN
FAULT
LOGIC
ILIM
25mA
25mA
1
μ
F
OUTA
FAULTB
FAULTA
ILIM
1
μ
F
OUTB
INA
INA
INB
INB
Figure 2. Functional Diagram
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| MAX1823EUB | Replaced by TMS320BC52 : Digital Signal Processors 100-LQFP |
| MAX1823HEUB | Dual USB Switch with Fault Blanking and Autoreset |
| MAX1840 | Low-Voltage SIM/Smart Card Level Translators in レMAX |
| MAX1841EUB | Low-Voltage SIM/Smart Card Level Translators in レMAX |
| MAX1840EUB | Low-Voltage SIM/Smart Card Level Translators in レMAX |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX1823BEUB+ | 功能描述:電源開關(guān) IC - USB Dual USB Switch w/Fault Blank RoHS:否 制造商:Micrel 電源電壓-最小:2.7 V 電源電壓-最大:5.5 V 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:SOIC-8 封裝:Tube |
| MAX1823BEUB+T | 功能描述:電源開關(guān) IC - USB Dual USB Switch w/Fault Blank RoHS:否 制造商:Micrel 電源電壓-最小:2.7 V 電源電壓-最大:5.5 V 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:SOIC-8 封裝:Tube |
| MAX1823BEUB-T | 功能描述:電源開關(guān) IC - USB Dual USB Switch w/Fault Blank RoHS:否 制造商:Micrel 電源電壓-最小:2.7 V 電源電壓-最大:5.5 V 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:SOIC-8 封裝:Tube |
| MAX1823EUB | 功能描述:電源開關(guān) IC - USB RoHS:否 制造商:Micrel 電源電壓-最小:2.7 V 電源電壓-最大:5.5 V 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:SOIC-8 封裝:Tube |
| MAX1823EUB+ | 功能描述:電源開關(guān) IC - USB Dual USB Switch w/Fault Blank RoHS:否 制造商:Micrel 電源電壓-最小:2.7 V 電源電壓-最大:5.5 V 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:SOIC-8 封裝:Tube |
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